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Threaded removable heater for a hot runner nozzle

A heater and nozzle technology, applied in the field of detachable heaters, can solve problems such as low heat conduction efficiency, and achieve the effects of efficient heat conduction, easy installation and disassembly

Inactive Publication Date: 2004-06-02
MOLD MASTERS 2007
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the prior art fixture heater arrangement tends to be complicated, and its heat transfer efficiency is lower than expected
Furthermore, proper installation of prior art devices generally requires some skill and additional time

Method used

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  • Threaded removable heater for a hot runner nozzle
  • Threaded removable heater for a hot runner nozzle
  • Threaded removable heater for a hot runner nozzle

Examples

Experimental program
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Effect test

Embodiment Construction

[0078] see now figure 2 , an injection molding device according to an embodiment of the present invention is represented by reference numeral 10 . The injection molding apparatus 10 includes a manifold 12 having a manifold flow path 14 for receiving pressurized plastic melt fluid from a manifold sleeve 16 . The manifold sleeve 16 extends between a support plate 42 and the manifold 12 and communicates with a machine nozzle 18 . Between the support plate 42 and the manifold 12 there is a spacer 44 . To compensate for thermal expansion of the injection molding device 10, the spacer 44 is generally flexible.

[0079] The hot runner nozzle 20 is connected to an outlet 21 of the manifold 12 . Nozzle runners 22 extend through each nozzle 20 to receive plastic melt fluid from the manifold 12 . A mold gate 24 is disposed adjacent the end of each nozzle 20 . The plastic molten fluid is controlled through the mold gate 24 to allow delivery of the molten fluid to the mold cavity 26 ...

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Abstract

A heater assembly for an injection molding apparatus comprises a heater sleeve having a threaded inner surface for engaging a threaded outer surface of a nozzle body of a nozzle or a threaded surface of a mold manifold. A clamping element such as a lock nut or a spring is provided adjacent the heater sleeve. The lock nut and / or the spring abuts the heater sleeve to force the threaded inner surface of the heater sleeve into contact with the threaded outer surface of the nozzle body. By using threads to clamp the heater to the nozzle the amount of heat transferred to the nozzle remains within an optimum range independent to the temperature of the heater.

Description

technical field [0001] The present invention relates to an injection molding apparatus, in particular to removable heaters for injection nozzles and manifolds. Background technique [0002] The generation and handling of molten material heat in injection molding units is important to ensure the production of high quality molded products. Heating of the molten material is generally carried out by installing several electric heaters adjacent to the machine nozzles, manifolds and hot runner nozzles. Several different types of electric heaters are available such as coil heaters, strip heaters, film heaters, heated tubes, induction heaters, and cartridge heaters. To optimize heat transfer to the molten material, heaters are sometimes integrated or embedded within the nozzle housing. Whole-integrated heaters are more expensive to manufacture and can generally only be replaced by replacing the entire nozzle. [0003] The use of a removable heater is preferred because it is inexp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C45/27H05B3/42H05B3/46
CPCH05B3/46B29C45/2737B29C2045/2743B29C2045/2772H05B3/42
Inventor 罗伯特·西西里亚丹尼斯·L·巴宾汉斯·冈瑟
Owner MOLD MASTERS 2007
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